Extruding press



A. F. WN UK EXTRUDING PRESS July 3, 1951 5 Sheets-Sheet 1 INVENTOR.

AnzlzanyFWm/' A TTORNEY Filed July 24, 1946 A. F. WNUK EXTRUDING PRESSJuly 3, 1951 3 Sheets-Sheet 2 Filed July 24, 1945 INVENTOR.

Anillo BY nyf' 'TTURNEY July 3, 1951 A. F. wNuK 2,559,207

' EXTRUDING PRESS Filed July 24, 1946 3 Sheets-Sheet 3 INVENTOR.

Anlcmf Wnuk BY v l I A TTORNE'Y Patented July 3, 1951 EXTRUDING PRESSAnthony F. Wnuk, Brooklyn, N. Y., assignor to Victor Metal ProductsCorporation, Brooklyn, N. Y., a corporation of New York Application July24, 1946, Serial No. 686,015

4 Claims.

This invention relates to presses for extruding slugs into collapsibletubes by impact extrusion and particularly to the means for feeding theslugs successively into the die.

In that type of slug feeding mechanism wherein a slug-holding hopper issecured to and reciprocated with the crosshead of the press, the slugsare agitated sufficiently to enter a slug tube, from the bottom of whichone slug at a time is removed and transferred to the fixed female die ofthe press. Owing to the necessity for removing the extruded tube fromthe male die or punch after the extruding operation and the need forsuiiicient space in the machine for that purpose, the hopper and itsdelivery tube cannot be arranged closely enough to the dies to feed theslugs directly thereinto, and consequently the slug must be moved asubstantial distance by separate mechanism into the die in timedrelation to the reciprocation of the cooperating punch. Since the pressoperates at relatively high speed, correspondingly timed movement of thesuccessive slugsy to the die has been accomplished by relatively fastmoving reciprocating mechanism operated by connections to moving partsof the press.

Considerable difficulty has been experienced with such slug feedingmechanism by reason of the momentum attained thereby and imparted to theslug, frequently causing failure of the mechanism to deliver the slugaccurately to its exact required position in the die by overrunning orunderrunning the die. Such delivery failure results in the cutting ofthe slug in two by the reciprocating punch with consequent waste of timeand material and danger of damage to the press parts and dies.

' I have found that by decreasing substantially the speed of transfer ofthe slugs and the length ojf the transfer, not only is dependable andacrection by a cam to move the slug just enough to clear the deliverytube of the slug hopper, whereby the speed of the slide may bemaintained at a minimum and the slug may be advanced by succeeding slugsfinally to drop accurately and dependably into its correct position inthe die.

curate transfer obtained, but the transfer mech- The invention furthercontemplates the provision of a slug runway from the delivery tube tothe die, the runway being adjustable to receive slugs differing indiameter, and of means cooperating with the runway for insuring thedelivery of the slug in its correct position to the die.

The invention further contemplates the provision of an overflow cup onthe delivery tube adapted to receive slugs mispositioned in and rollingout of the tube and likely to interfere with the proper operation of themechanism.

The invention further contemplates the provision of slug feeding meansreadily interchangeable with similar means to adapt the press to maketubes of different sizes from slugs of correspondingly different sizes.

The various objects of the invention will be clear from the descriptionwhich follows and from the drawings, in which Fig. l is a top plan Viewof the slug delivery and transfer mechanism showing in dash-dot linesthe adjoining part of the press to which the mechanism is applied.

Fig. 2 is a Vertical sectional view of the mechanism taken on the line 22 of Fig. l showing in dash-dot lines the uppermost positions assumed bythe adjoining parts of the press.

Fig. 3 is a similar fragmentary sectional View taken on the line 3-3 ofFig. l of the delivery end of the runway for the slugs.

Fig. 4 is a longitudinal vertical sectional View thereof.

Fig. 5 is a fragmentary top plan view of the removable and replaceableslug transfer slide.

Fig. 6 is a side elevational view and vertical cross sectional viewcombined of the support for the cam roller and the outer end portion ofthe transfer slide.

Fig. 7 is a vertical cross sectional View of the slug delivery pipe andof the overflow cup together with the support therefor.

In the embodiment of the invention shown by Way of example, theextruding press may be of any of the usual types having a reciprocatingcross-head lll reciprocated by any suitable mechanism toward and fromthe relatively iixedvbut quickly removable and replaceable female die IIwhich is provided with a suitable die cavity into which a disc-like slugI2 is delivered when the cross-head is at or near the top of the upstroke thereof shown in dash-dot lines in Fig. 2. The punch I3 carriedby the cross-head for quick replacement and reciprocated therewith is ofthe usual type adapted to enter the die I I thereby to extrude the sluginto a tube around the punch on the down stroke, and to carry the tubewith it on the up stroke out of the die to ready the die for thereception of the next slug.

Secured to the cross-head I4 and reciprocating therewith is theremovable and replaceable slug hopper I4 in which the slugs are agitatedto some extent during such reciprocation. The upper end of the removableand replaceable delivery tube I5 is inserted into the hopper and is opento receive the slugs which normally accumulate in a horizontal positionin the tube to form a stack as I6 (Fig. 2). Occasionally however, one ofthe slugs as Il instead of lying flat in the stack, may stand on edge,in which position it cannot be advanced by the transfer mechanism laterto be described A slot as I8 is therefore made in the tube for access bythe operator to the mispositioned slug, the operator manually turningthe slug into its correct position in the stack. Should themispositioned slug roll out of the upright slot I8, it might reach thepress mechanism and interfere with the proper operation thereof. Theoverflow cup I9 is therefore provided to catch such rolling slugs. Saidcup is mounted on the tube I5 below the slot I8 and is secured in placeby the nut 20 screwed on a threaded portion of the tube and coactingwith the sleeve 2| of the support 22 on which the cup rests to hold thecup and the tube in position. The base of the support 22 is suitablysecured as by the bolts 23 to the ixedplate 24 which serves a guide forthe transfer slide 25 andl which is adjustably supported by the brackets26 and 21.

Adjustment of the plate 24 is sometimes required to insure the transferof the slugs in precisely the proper direction from the bottom of thetube I5 to deposit the slug in the die. For this purpose, the bracket 2Bis secured .to the frame 28 of the machine by bolts as 29 passingthrough oversized holes as 30 in the bracket 26 and thereby permittinglimited but sufficient adjustment of the bracket in all directions inthe plane of the face 3l of the bracket to accomplish the desiredadjustment. Similarly, the bracket 21 is secured to the frame by thebolts 32 passing through slots or oversized holes 33 in the basethereof. Vertical adjustment of the plate 24 is obtained by insertingthe pin projection 34 thereof loosely into the upright hole 35 of thebracket 2 and securing the pin in its adjusted position by the set screw36. It will now be seen that the plate 24 may be pivotally adjustedabout the pin 34 in a horizontal plane and also raised or lowered topermit removal of th bottom slug from the stack I6, and to permit thealignment of therunway of which the plate forms a part, with the tube I5and the die II.

rIhe transfer slide 25 for removing theA slug from the stack andinserting the removd slug into the runway is made preferably in twoparts. The inner part 33 is removably secured to the outer part 39 as bymeans of the screws 4D (Figs. l and 5) and terminates at its inner endin a serrated semi-circular` edge 4I of the same diameter as that of theslug which the slide part 38 is intended to advance. The serrated .edge

serves to breakL any oilV seal which may be formed.

Y .each complete reciprocationof the slide. When* between the edge andthe slug, which seal might otherwise adhesively secure the slug to theslide and cause retraction of the slug on the return movement of theslide 25.

Obviously, by the use of slugs and dies of the proper sizes, the pressmay be adapted to make tubes of various sizes. The female die and punchbeing removable and quickly replaceable by another set thereof, toVchange the press over to make tubes of another size, there remains onlythe need for the substitution of different slug feeding partsdimensioned to transfer slugs of the other size. Such parts include theslide part 38, the hopper I4 and the delivery tube I5, while theremaining parts of the transfer mechanism may remain in place except aswill be explained hereinafter.

The outer slide part 39 is provided with dovetailed side edges 42 (Fig:6) fitted into the dovetailed guide groove 43 of the plate 24 and slidesin said groove a distance in each direction slightly greater than theouter diameter of the tube I5 or a distance approximately equal to saiddiameter to insure the proper engagement of the slide part 38 with thelowermost slug of the stack and also to insure the advance of said slugenough to completely clear the tube. The mechanism for reciprocating theslide to advance the slug will now be described.l

Secured to the slide part 39 as by the screws 44 passing through thebase 46 thereof, is the roller bracket 4l carrying the cam roller 48. Tothe projecting arms 49 of the bracket are secured the left ends (asviewed in Fig. 1) of the springs 5U, the other ends of which are securedto fixed parts as 5I of the slug runway, whereby the-v roller 48 ispulled against the cam 52 in the mitted by the cam to do so. The cam 52is secured replaceably to the bracket 53 which is in turn fixed to thecross-head I and recipro-l cates therewith. Consequently, in changingthe machine over to operate on tubes of a different,

size, the cam 52 may if desired be replaced by another similar camgiving the required throwY to the slide and a corresponding slide partsimilar to the part 33 substituted. If desired, the cam 52 may have athrow equal to the maximum movement of the transfer slide in which casereplacement of the cam may be avoided. The cam 52 is provided with aninclined Vedge .54 meeting the upright edge 55 of the cam and having ahorizontal component equal at least to the desired throw. It will now beseen that downward movement of the cross-head I0 withdraws the bracket47 and the slide 25 to ycarry the edge 4I of the replaceable slide part39 to the left of the tube I5 and to a point adjacent said tube. Thispermits the stack I6 which normally rests on the slide to drop until thelowermost slug of the stack rests on the plate 24 preparatory to theadvance of said lowermost slug. On .the upward movement of thecross-head, the springs 55 become effective to move the bracket 41 andvother side of the tube and adjacent to said tube,-

while lthe remainder of the stack rests on the slide. As this operationis repeated, a row of slugs accumulates in the runway, the entire rowbeing advanced as a unit in therunway through a distance equal to thediameter of the slug on die, each reciprocation of the slide forwardstheright hand end slug slowly into the die to deposit it-accuratelythereinto ready for extrusion.

The construction of the runway is such that it may readily be adjustedto guide slugs of clilTerent diameters and to control the movement ofthe row of slugs so that no overturning of the slugs or overshooting ofthe die can occur, it being understood that the slug cannot undershootthe die because of the positive movement imparted to the row of slugs bythe addition of a slug to one end of the row, thereby causing the entirerow to move exactly the diameter of the slug on each reciprocation ofthe slide and the punch. The plate 24 is preferably extended toward theright past the tube I5 (as viewed in Figs. 1 and 2) and up to or nearthe die Il to form the bottom of the runway, but as seen in Figs. 3 and4, the dovetail groove 43 of the plate is omitted and the upper surfaceof the plate is fiat as shown at 56.

Separate transversely spaced plates as 51, 58 form the sides of therunway and are adjustably secured to the upper surface 56 as by thescrews 59 passing through transversely extending slots 6D in said sideplates. The distance between the inner edges of said plates is adjustedto the diameter of the slug to be transferred. To prevent the slugs fromrising in the runway, a cover 6| is removably secured to one of theplates as 51 and is wide enough to cover the greater part of the row ofslugs, but exposes enough of the slugs (see Fig. 1) to permit theoperator to inspect them.

Means are provided to control and resist the movement of the end slugsof the row and to brake said movement to prevent overshooting of thedie. As best shown in Figs. 3 and 4, said means comprises a sheet spring62 having one free end portion B4 thereof in pressed contact with theupper faces of the slugs and the other end portion 63 thereof secured ina suitable groove in the under face of the cover, the groove extendingthe length of the spring to allow the spring to flex to a limitedextent. The spring keeps the slugs from vibrating in the runway andwhile not retarding the movement of the slugs, acts as a brake againstsuch free movement or momentum of the slugs as might cause them tooverrun the die. Hence only movement of the row is imparted to the endslugs, which are maintained in their proper flat positions by the springuntil the end slug drops into the die cavity.

It will be seen that I have provided a feed mechanism well designed forinterchangeability of the parts thereof to accommodate slugs ofdifferent diameters particularly in a press wherein the die and punchare readily changeable, that the mechanism is simple in construction,having few parts moving through relatively short distances and atrelatively slow speed thereby avoiding excessive wear thereon, and thatthe movement of the slug may be accurately controlled and the slug feddependably into its correct position in the die.

While a certain specic embodiment of the invention has been shown anddescribed herein, changes may obviouslyl be made therein withoutdeparting from the spirit of the invention dened in the appended claims:

I claim:

1. In an extruding press, a fixed upright slugdelivering pipe adapted tohold a stack of slugs, a horizontally reciprocating slide for advancingone slug at a time from the bottom of the stack to a predetermined pointspaced from the stack a distance greater than the stroke of said slide,said stroke being slightly greater than the diameter of the pipe, ahorizontal runway between the stack and said point, in which runway theslugs advanced by the slide accumulate in a row and slide as a unit onthe addition of a slug to the beginning of the row by the slide, a pindepending from the runway and a bracket pivotally supporting the pinwhereby the runway is adjustable about the pin in a horizontal plane,serrated means at the end of the slide for preventing oil-adhesion ofthe slug to the slide, and a spring brake inthe runway arranged toengage and to resist movement of a plurality of slugs nearest said pointto prevent the last slug of the row from overrunning said point.

2. The extruding press of claim 1, the means for preventing oil-adhesionof the slug to the slide comprising a generally concave end on theslide, said end having a plurality of triangular notches therein eachmeeting the adjacent notches at said concave end to provide spaced apartparallel edges for engaging the slug.

3. The extruding press of claim 1, the spring brake comprising a coverfor the major part of the runway extending from one side toward theother side and past the middle of the runway and a sheet spring havingone end part secured to the under side of the cover and the other endpart free and biased toward the bottom of the runway to engage the upperflat faces of the slugs at the end of the row and thereby pressing theslugs downwardly against the bottom of the runway.

4. The extruding press of claim 1, the pipe having a slot therethrough,and a circular cup concentrically surrounding and carried by the pipebelow the slot and of sucient diameter to receive and retain slugsdropping out of the slot and thereby preventing damage to such slugs andpreventing such slugs from interfering with the operation of the press,the cup having a central -aperture therein, and the pipe passing throughthe aperture and being externally threaded above and below the aperture,and clamping means on the pipe above and below the bottom of the cup andcooperating with the threaded part of the pipe to clamp the cup to thepipe.

ANTHONY F. WNUK.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 1,352,194 Hooker Sept. 7, 19201,652,032 Lynch Dec. 6, 1927 1,792,865 Prussing Feb. 17, 1931 1,981,490Witte Nov. 20, 1934 2,096,245 Heinze et al Oct. 19, 1937 `2,166,209Friden July 18, 1939

